Keyboard



FIG. 1 is a top plan view of a keyboard showing my new design, thebroken line disclosure of keys are for illustrative purposes only andform no part of the claimed design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is a left side elevation view thereof.

I claim the ornamental design for a keyboard, as shown and described.